And the massive effort to get tens of thousands inside that stadium. There was a real security jam. Crowds of fans packing into stations throughout the New York City area. This is just one entrance to a train station. All those fans waiting to enter. Tsa agents standing by. And just look at the train platforms in the hours before the game. Fans decked out, waiting to pack into those trains. ABC's gio Benitez is at metlife stadium tonight, where there is unprecedented security. Reporter: The first mass transit super bowl had a rocky start. Thousands of fans waiting for more than an hour to get on the trains to the stadium. An hour and a half. We left the hotel 2 1/2 hours ago. Reporter: And you were dressed ready for cold weather and it was hot. It was very hot. Reporter: The trains were moving fast, but intense security brought the station in New Jersey to a dangerous halt. There was sweat on the floor. People were exhausted. Men, 80-year-old men just dripping. Reporter: But once the fans were in, exhaustion turned back into excitement. Fans showing off their creative outfits. Go hawks! Bronco maniacs, I have arrived. Reporter: Some not sure what team to root for. Check out these shirts. We grew up in Washington and two years ago, we moved to Denver. Reporter: What did you do? You made these? Yeah, these are just two Jerseys. Reporter: And even with those big delays, believe it or not, this was the earliest crowd arrival in some 30 years. 80,000 fans packing into that stadium by 5:15, David. They were excited to be there. All right, gio.

This transcript has been automatically generated and may not be 100% accurate.

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